Poly (vinyl alcohol) thin film filled with CdSe–ZnS quantum dots: Fabrication, characterization and optical properties

A transparent poly (vinyl alcohol) (PVA) nanocomposite thin film (30–50 nm) reinforced with core/shell cadmium selenide (CdSe)/zinc sulfide (ZnS) quantum dots (QDs) was fabricated by a drop-casting method. A narrow peak at ∼556 nm observed in the UV–vis spectrum indicates the uniformly dispersed QDs...

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Bibliographic Details
Published in:Materials chemistry and physics 2010-01, Vol.119 (1), p.237-242
Main Authors: Suo, Baoting, Su, Xin, Wu, Ji, Chen, Daniel, Wang, Andrew, Guo, Zhanhu
Format: Article
Language:English
Subjects:
Composite materials
Optical materials
Optical properties
Quantum dots
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Summary:A transparent poly (vinyl alcohol) (PVA) nanocomposite thin film (30–50 nm) reinforced with core/shell cadmium selenide (CdSe)/zinc sulfide (ZnS) quantum dots (QDs) was fabricated by a drop-casting method. A narrow peak at ∼556 nm observed in the UV–vis spectrum indicates the uniformly dispersed QDs in the PVA matrix. FT-IR analysis indicates the interaction between the QDs and the polymer matrix. Both PVA and PVA-QDs nanocomposite thin films show polarized light dependent absorption properties with several different absorption peaks. As compared to the only fluorescent emission peak at 574 nm of QDs, the pure PVA and PVA-DDs nanocomposites show an excitation wavelength dependent fluorescent emission property.
ISSN:0254-0584
1879-3312
DOI:10.1016/j.matchemphys.2009.08.054